Nissan Versa (N17): P1148 closed loop control

Nissan Versa 2nd generation (N17) Service Manual / Engine / Engine control system (EC) / P1148 closed loop control

DTC Logic

DTC DETECTION LOGIC

NOTE: DTC P1148 is displayed with DTC for A/F sensor 1.

When the DTC is detected, perform the trouble diagnosis of DTC corresponding to A/F sensor 1.

DTC No. Trouble diagnosis (Trouble diagnosis content) DTC detecting condition Possible cause
P1148 CLOSED LOOP-B1 (Closed loop control function) The closed loop control function does not operate even when vehicle is being driven in the specified condition.
  • Harness or connectors (A/F sensor 1 circuit is open or shorted.)
  • A/F sensor 1
  • A/F sensor 1 heater

Diagnosis Procedure

DTC P1148 is displayed with DTC for A/F sensor 1.

When the DTC is detected, perform the trouble diagnosis of DTC corresponding to A/F sensor 1.

Refer to EC, "DTC Index".

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Other materials:

Exterior front
1. Engine hood 2. Windshield 3. Wiper and washer switch 4. Power windows (if so equipped) 5. Door locks. NISSAN Intelligent Key (if so equipped). Key fob (if so equipped). Keys 6. Mirrors 7. Tire pressure. Flat tire. Tire chains 8. Headlight and turn signal switch. Replacing bulbs 9. Fo ...

Diagnosis and repair work flow
Work Flow NOTE: The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information. Activate and display TPMS transmitter IDs Display tire pressure reported by the TPMS transmitter Read TPMS DTCs Register ...

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